Today's confirmation that Apple is going x86 makes today a historic day in the industry. It may mean that Microsoft might see a few percent decline of their market share the next few years, but what about Linux? If Linux were to lose an equal amount of share it would alter its spread to the desktop, a spread that has been very positive so far.

Means more compitation!
1. Linux will struggle to match the UI of Mac and professional feel of Mac
2. Linux has come long way and still has not managed to really give a tough time to Windows desktop so fighting against the Mac desktop is atleast 3 years away.
3. If the Mac is available on x86 its time for MS people to worry and Linux can now more focus on Server side.
4. If at all Linux wants to fight against the Mac desktop then we have to adopt the X skills what Mac practics. Cause their is not compitation to UI of Mac as of now.
5. People who doesnt want to spend a penny can still stick to Linux and enjoy then have nothing to do with Mac switching to x86, for them it is just another choice on x86!